Good Useful Formulas Plus More

This has helped me many times.

Neat Thanks … Roy

I agree thanks Roy

Your welcome … Roy

I couldn’t get the file open on my end.

Send me your email address… Roy

I had no problem opening or seeing file.
Thanks again Roy useful information to have to hand


It wouldn’t open on my iPad, no problems on the laptop. Thanks Roy!
Geeezz, I used to have all that stuff memorized:shock: now I need a cheat sheet;-)
Getting old is better than getting none!:mrgreen:

Cannot open the link, either.

Here it is at dropbox .
I will delete this one after a week.
This one is a lot clearer. I had to reduce the other one to upload it here.

Here is a cool formula.
It will give you how many sheets of drywall you will need.
I have used this one over and over again.
The last house I used this on I only needed another 1/2 sheet.

Total square foot of home divided by the square foot of the board times 3.5

Example: 2000 ft home using 4X12 sheets . The 48 is the size of the board in sf ( i.e. 4X12=48 ) . If they were 4X8 sheets it would be 32.

2000 sf / 48 = 41.666 X 3.5 = 145.833 sheets (using 4X12 sheets)

2000 sf /32=62.5 =218.74 sheets (using 4X8 sheets)


If you have a useful formula post it.

Thanks Roy :slight_smile:

It been a while since I posted these.
For the new guys these can be helpful.
The previous links above this post are dead.
See attached…Or here is the dropbox link…
Dropbox - Formulas.pdf

Thanks for reposting Roy!

Thanks Roy!

The old carpenter formula for squaring a wall was 6-8-10.
Meaing…6’ on one leg of the wall, 8’ on the other…should be 10’ across.

It is displayed in one of the formulas you have. Just simplified.